Honeywell RTH5100B User manual

RTH5100B
Non-Programmable Digital Thermostat
Quick Installation Guide
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69-2329EF—03 ii
Installation is Easy
Label wires and remove your old thermostat
Install and wire your new thermostat
Set your new thermostat to match your heating/cooling system
– It is preset for the most common system
We are here to help.
Call 1-800-468-1502 for wiring assistance before
returning the thermostat to the store.

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1Turn Off Power to Heating/Cooling System
M28097

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Remove old thermostat but leave wallplate with wires attached.
2Remove Old Thermostat
M28099
Is there a sealed tube containing
mercury? If so, see back cover
for proper disposal instructions.
Leave wallplate
in place
Old thermostat
Cover

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Label the wires using the supplied wire labels as you disconnect them.
3Label Wires with Tags
Wire Labels
M28100
M28093

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M29532
4Separate Wallplate from New Thermostat
Wallplate
Pull here to remove wallplate from new thermostat.
Remove battery holder.

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Mount the new wallplate using the included screws and anchors.
5Mount Wallplate
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
MCR29533

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MCR29534
Simply match wire labels.
6Connect Wires
Labels don’t match? See page 21.
Have a Heat Pump system? See page 13.
We are here to help.
Call 1-800-468-1502 for wiring assistance.
Remove metal jumper if
you have both Rand Rc
wires.

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MCR29535
Install two AAA alkaline batteries.
Back of thermostat
7Install Batteries

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Install thermostat onto the
wallplate on the wall.
8Install Thermostat onto Wallplate
MCR29536

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Turn the power back on to the heating/cooling system.
9Turn Power Back On
M28098

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If your system type is:
q Single Stage Heat and Cool
Congratulations, you’re done!
If your system type is:
q Heat Pump* without Backup Heat
q Heat Only
Continue with advanced installation
on page 12 to match your thermostat to your system type.
*Heat Pump—an air conditioner that provides cooling in the summer, and also
runs in reverse in the winter to provide heating.
If you are not sure of your system type or if you have other questions,
call us toll-free at 1-800-468-1502.
This thermostat works on 24 volt or 750 mV systems. It will NOT work on
multi-stage heat pump systems or 120/240 Volt systems.
10 If your system type is...

Advanced Installation
System setup...................................................................................................... 12
Wiring.................................................................................................................. 19
Troubleshooting..................................................................................................20
Customer assistance .........................................................................................22
Limited warranty.................................................................................................23

TROUBLESHOOTINGASSISTANCE SETUPWIRING
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Advanced Installation Guide
Next
1
0
Done
MCR29538
MCR29537
Press and hold the sand FAN buttons until the screen changes
(approximately 5 seconds).
System setup
SettingFunction
Press s or tto change
settings.
Press NEXT to advance
to next function.
Press DONE to exit
and save settings.

TROUBLESHOOTINGASSISTANCESETUP WIRING
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RTH5100B
Function 1: System type
Next
1
0
Done
MCR29539
Press the s or t button to select the type of system you have in your
home:
0Heating & cooling: Gas, oil or electric heating with central air
conditioning.
1Heat pump: Outside compressor provides both heating and cooling.
2Heating only: Gas, oil or electric heating without central air
conditioning.
3Heating only with fan: Gas, oil or electric heating without central air
conditioning. (Use this setting if you could turn the fan on and off with a
fan switch on your old thermostat.)
Press to change setting.
When correct setting is
selected, press NEXT to
display next function.
MCR29540

TROUBLESHOOTINGASSISTANCE SETUPWIRING
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Advanced Installation Guide
Function 2: Heat pump changeover valve
Next
2
0
Done
MCR29541
Press the s or t button to select whether your changeover valve is used
in heating or cooling:
NOTE: If Function 2 does not appear, please turn to the next page to
continue.
0Cooling changeover valve: Use this setting if you connected a wire
labeled “O” to the O/B W wire terminal (see page 21).
1Heating changeover valve: Use this setting if you connected a wire
labeled “B” to the O/B W wire terminal (see page 21).
Press to change setting.
When correct setting is
selected, press NEXT to
display next function.
MCR29540

TROUBLESHOOTINGASSISTANCESETUP WIRING
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RTH5100B
Function 3: Heating fan control
Next
3
0
Done
MCR29542
Press the s or t button to select your heating system and fan operation:
NOTE: If Function 3 does not appear, please turn to the next page to
continue.
0Gas or oil heat: Use this setting if you have a gas or oil heating system
(system controls fan operation).
1Electric heat: Use this setting if you have an electric heating system
(thermostat controls fan operation).
Press to change setting.
When correct setting is
selected, press NEXT to
display next function.
MCR29540

TROUBLESHOOTINGASSISTANCE SETUPWIRING
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Advanced Installation Guide
Function 5: Heating cycle rate
Next
5
5
Done
MCR29543
Press the s or t button to select your heating system and optimize its
operation:
5Gas or oil furnace: Use this setting if you have a standard gas or oil
furnace that is less than 90% efficient.
9Electric furnace: Use this setting if you have any type of electric
heating system.
3Hot water or high-efficiency furnace: Use this setting if you have a
hot water system or a gas furnace of greater than 90% efficiency.
1Gas/oil steam or gravity system: Use this setting if you have a steam
or gravity heat system.
Press to change setting.
When correct setting is
selected, press NEXT to
display next function.
MCR29540
NOTE: If Function 5 does not appear, please
turn to the next page to continue.

TROUBLESHOOTINGASSISTANCESETUP WIRING
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RTH5100B
Next
12
0
Done
MCR29544
Function 12: Manual/Auto Changeover
Press the s or t button to select Manual or Auto Changeover:
NOTE: System maintains a minimum 3ºF
difference between heat and cool settings.
CAUTION: To avoid possible compressor
damage, set to option 0 if the outside
temperature drops below 50ºF (10ºC).
0Manual Changeover: (Heat/Off/Cool)
1Automatic Changeover: (Heat/Off/Cool/Auto) Automatically turns on
heat or cool based on room temperatures.
Press to change setting.
When correct setting is
selected, press NEXT to
display next function.
MCR29540

TROUBLESHOOTINGASSISTANCE SETUPWIRING
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Advanced Installation Guide
Function 14: Temperature display
Next
14
0
Done
MCR29545
Press the s or t button to select Fahrenheit or Celsius temperature
display:
0Fahrenheit temperature display (°F)
1Celsius temperature display (°C)
Press to change setting.
When correct setting is
selected, press NEXT to
display next function.
MCR29540